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The 500-lb crate is hoisted using the ropes AB and AC. Each rope can withstand a maximum tension of 2500 lb before it breaks. If AB always remains horizontal, determine the smallest angle θ to which the crate can be hoisted.
An elevator has mass 600 kg, not including passengers. What is the maximum number of passengers that can ride in the elevator
A parallel-plate capacitor has an area of 5.15 cm2, and the plates are separated by 1.05 mm with air between them. It stores a charge of 337pC. What is the potential difference across plates of the capacitor.
a light beam is traveling through an unknown substance. when it exits that substance and goes into air the angle of
Suppose a 61 kg boy and a 43 kg girl use a mass less rope in a tug-of-war on an icy, resistance-free surface. If the acceleration of the girl toward the boy is 3.0 m/s2, find the magnitude of the acceleration of the boy toward the girl.
A force of 25.33 N is applied tangentially to a wheel of radius 0.340 m and gives rise to an angular acceleration of 1.20 rad/s^2
If a Saturn V rocket with an Apollo spacecraft attached has a combined mass of 2.4 multiplied by 105 kg and reached a speed of 11.2 km/s, how much kinetic energy would it then have?
A 2250 kilogram car traveling at 10.0 m/s collides with a car of mass 2750 kilogram that is initially at rest at a stoplight. Find the coefficient of kinetic friction between the road and the cars
A proton is initially at rest at a point where the potential is 507V. Sometime later the proton is at a point where the potential is 187V. If no force other than the electrostatic force acts on the proton, what is its final kinetic energy.
A rope is attached to a ball, and then the ball is swung with constant speed in a horizontal circle of radius 1 m. If the tension in the rope is 100 N, How much work does the tension force do on the ball
Three vectors have the same magnitude of 18 units. They make angles of ?, 2 times ? and 3 times ? with respect to the x axis, where ? = 14 o. What is the y-component of their vector sum
The energy of the ground state in the Bohr model of the hydrogen atom is -13.6 eV. In a transition from the n = 2 state to the n = 4 state, a photon of energy
A 39.2-kg boy, riding a 2.67-kg skateboard at a velocity of +5.37 m/s across alevel sidewalk, jumps forward to leap over a wall. Just afterleaving contact with the board, the boy's velocity relative to the sidewalk is 5.52 m/s, 9.72° above the horizo..
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